Browse Prior Art Database

Disk File Air Filtration

IP.com Disclosure Number: IPCOM000039305D
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Coles, RJ: AUTHOR [+2]

Abstract

A disk file employs sintered mesh spacers between the disks to enable both circulation and filtration of air passing around the disks via an internally vented hub. The centrifugal pumping action of the disks circulates the air, and the spacers ensure that 100% filtered air is supplied between the disks, eliminating unwanted debris. In the drawing showing a part section through a disk file, the disk spacers 1 are manufactured as direct replacements for existing spacers but are made as sintered metal air filters. The excessive air flow experienced by traditionally vented disks may be controlled by varying the density (impedance) of the spacers 1, and air noise is minimal. To obtain the mechanical sizes required, the sintered spacer/filters 1 are ground on the faces meeting the disks 6.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Disk File Air Filtration

A disk file employs sintered mesh spacers between the disks to enable both circulation and filtration of air passing around the disks via an internally vented hub. The centrifugal pumping action of the disks circulates the air, and the spacers ensure that 100% filtered air is supplied between the disks, eliminating unwanted debris. In the drawing showing a part section through a disk file, the disk spacers 1 are manufactured as direct replacements for existing spacers but are made as sintered metal air filters. The excessive air flow experienced by traditionally vented disks may be controlled by varying the density (impedance) of the spacers 1, and air noise is minimal. To obtain the mechanical sizes required, the sintered spacer/filters 1 are ground on the faces meeting the disks 6. Hub 2 is not perforated but has deep disk locating ribs defining channels which allow the air to pass over the outside of the hub before entering the filters. This system does not generate a low pressure zone inside or below the hub and this thus has the advantage of being less likely to draw in debris from the spindle/bearing area. Gap 3 is small, and there are no impeller blades on the lower face or the hub. Slots 4 in disk clamp 5 provide a return path to filter 1 for air that has circulated around the disks.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-text objects]